Servo-pressure contact device for overlarge current primary current-carrying conductor

A technology of current-carrying conductors and contact devices, which is applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problems of large differences in test results, inability to simulate the working environment, uneven distribution of magnetic fields, etc., and achieve simple structure and safe operation Reliable, easy access effect

Active Publication Date: 2016-11-23
DALIAN NO 1 INSTR TRANSFORMER +1
View PDF11 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using the equal-ampere-turn method to verify and test the current transformer, there will be two problems: one is that the actual working environment cannot be simulated, and the other is that the stray magnetic field generated by the external current is superimposed on the main magnetic field of the primary equal-ampere-turn winding of the current transformer. , will generate an unevenly distributed magnetic field in the tested current transformer, which will cause a large difference between the test results and the actual working conditions, and the discreteness in the operation process is large, and the reproducibility is not good

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Servo-pressure contact device for overlarge current primary current-carrying conductor
  • Servo-pressure contact device for overlarge current primary current-carrying conductor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0016] Such as figure 1 , 2 As shown, the follow-up pressure contact device of the ultra-high current primary current-carrying conductor provided by the present invention, the primary current-carrying conductor 5 is made of a copper rod, the diameter of the copper rod in this embodiment is 200 mm, its own weight is 150 kg, and its length is 1340 mm. The high current is above 40kA, and the duration is above 20 hours. The top of the primary current-carrying conductor is connected to the driving mechanism of the ultra-high current test equipment, and the driving mechanism drives the primary current-carrying conductor to move up and down, so that the ultra-high current transformer with a through-core structure can be put in and taken out. The upper and bottom ends of the primary current-carrying conductor are respectively provided with annular grooves 12, and the hoops ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a servo-pressure contact device for an overlarge current primary current-carrying conductor. According to the device, a hoop is respectively arranged at the upper part and the bottom end of a mobile primary current-carrying conductor, and is connected with the upper part and the bottom end of the mobile primary current-carrying conductor into a whole; bus-bars connected with a power supply source are correspondingly arranged under the hoops; the upper bus-bar is arranged on a primary current-carrying conductor in a sleeving manner, and the lower bus-bar is positioned under the primary current-carrying conductor; a servo-pressure contact structure is correspondingly arranged under each bus-bar, and opposite acting forces are generated from the servo-pressure contact structures, so that close face contact is formed between the hoops and the bus-bars. The servo-pressure contact device has the characteristics that parts of the servo-pressure contact device are closely contacted, the contact parts have small resistance, and equipment damage caused by local heat can be prevented. The servo-pressure contact device has simple structure and safe and reliable operation, has completely same test state and actual working condition and accurate testing data, and is suitable for performance testing of various current transformers and other electric appliances under a condition of 40KA or over.

Description

technical field [0001] The invention relates to a device for performance testing of electrical components under super-high current conditions, in particular to a follow-up pressure contact device for super-high current primary current-carrying conductors. Background technique [0002] At present, the rated power of large generators has reached 1000MVA or even greater, and the output current of generators can reach 30-50kA. This means that the current transformers used for generator sets are faced with increasingly harsh environmental conditions. First, the super-large current brings a sharp increase in magnetic field strength; second, the primary conductors are arranged in three-phase or six-phase. The phase spacing is reduced. The adjacent-phase interference caused by thermal power or nuclear power units is the most important; the third is the increase in ambient temperature caused by operation. In order to meet the above working conditions, higher requirements are put for...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
CPCG01R35/02Y02E40/60
Inventor 李新夏广新杨延瑞沙玉洲刘振锋徐晓杰葛连旭胡光远
Owner DALIAN NO 1 INSTR TRANSFORMER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products